Abstract of the 212th meeting of CCEP

 The 212th meeting of the Coordinating Committee for Earthquake Prediction(CCEP) was held at the Kanto Regional Survey Department of the GSI on August. 22th, 2016. 　First of all, nationwide monitoring data of the seismic activity and the crustal deformation were reported. After that, we discussed about intensive discussion subject "Postseismic slip and viscoelasticity".　Please see to the overviews below.

Documents (PDF：31MB)

• Deliberation about crusutal activity monitoring.

1.1 General crusutal activities.
（1）Seismic activities of Japan.
     p.3 (JMA)
（2）Activity of shallow very-low-frequency earthquakes around Japan.
     p.4 (NIED)
（3）Strain changes in the Japanese Islands.
     p.5 (GSI)
1.2 The coupling state and change on the plate boundary.
(1)Around Japan Trench and Chishima Trench.
     Seismic activityies in off Sanriku pp.6-7(JMA)
     Earthquake of northern part in Ibaraki Pref. p.8(JMA)
(2)Around Sagami trough and right under the metropolitan Japan.
     Earthquake of southern part in Ibaraki Pref. p.9(JMA)
(3)Suruga-trough, Nankai-trough and around the Nansei-shoto trench.
     Sea bottom crustal deformations along Nankai-trough p.10(JCG)
     Unsteady crustal deformation in Kii channel pp.11-12(GSI)
     Unsteady crustal deformation in Shikoku and Kyushu(1) p.13(GSI)
     Unsteady crustal deformation in Shikoku and Kyushu(2) pp.14-15(GSI)
     Activity of shallow very-low-frequency earthquakes and short-term SSE in southwest Japan p.16 (NIED)
1.3 Others.
(1)Earthquake at Uchiura Bay pp.17-18(JMA)
(2)2016 Kumamoto earthquakes pp.19-20(JMA)   pp.21-22 (GSI)


• Postseismic deformation and viscoelastic rebound due to the 2011 Tohoku earthquake -Toward forecasting the crustal deformation and activity over the Japan Islands- pp.25-26 (Convener: Hirahara (Professor), Kyoto University)
  

(1) Purpose and outline
     Postseismic deformation and viscoelasticity - Fundamental understandings - p.27 (Hirahara (Professor), Kyoto University)
(2) Postseismic deformation of the 2011 Tohoku-oki earthquake
     Postseismic deformation associated with the 2011 off the Pacific coast of Tohoku Earthquake -Seafloor observations and viscoelastic structure model- p.28 (Iinuma (Scientist), JAMSTEC)
     Analysis on post-seismic deformation of the Tohoku-oki earthquake with heterogeneous rheology p.29 (Muto (Assistant Professor), Tohoku University)
     Resolving viscosity structure and afterslip from displacements following the 2011 Tohoku-oki, Japan Earthquake p.30 (Hashima (Project Researcher), ERI)
     Importance of rheological heterogeneity for interpreting the viscoelastic relaxation following the 2011 Tohoku-oki earhtquake p.31 (Suito (chief researcher), GSI)
(3)Prediction of wide crustal activity in Japanese islands
     Construction of 3D heterogeneous viscoelastic model in and around Japanese island p.32 (Hori (Senior Scientist), JAMSTEC)

• Purport of next intensive discussion subject "Nankai-trough earthquake".

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